I admire the attitude of those who want to set up billboards but I agree with Simon about its being not cost effective especially at $3,200. That money could be better spent on thousands of leaflets that are addressed to the public at large, not JWs. Something along the lines of "The pedophile at your door".
If something like that were to be done it should be set up in a major urban area where a lot of people should see it. Also fixing any mistakes on it, like the URL which has issues, would also be expensive unless it's an internet problem. That is definitely a turn off for the people watching it.
By the way, there is no question mark on the Spanish version at the bottom.